Transcript File
CHARACTERISTICS OF LIFE All living things have Cells All living things Respond to change Homeostasis All living things Reproduce All living things have DNA All living things use Energy All living things Grow and Develop BARE NECESSITIES FOOD WATER AIR A PLACE TO LIVE CHEMISTRY OF LIFE Proteins Carbohydrates Lipids Nucleic Acids PROTEINS Large molecules made up of subunits called amino acids They perform many important functions Enzymes are proteins that help chemical reactions occur quickly CARBOHYDRATES Groups of compounds made of sugars. Simple sugars are used as energy Complex Carbs are used for energy storage LIPIDS Compounds that cannot mix with water Store energy (fats and oil) and form the cell membranes (phospholipids) NUCLEIC ACIDS Compounds made up of subunits called nucleic acids DNA is a nucleic acid- Carries the instructions on how to make proteins A CELL’S FUEL ATP- Adenosine triphosphate When food (carbohydrates and fats) is broken down, energy is transferred to ATP molecules. ATP is then used by the cell to fuel its activities CLASSWORK Blog- Characteristics of living things Questions: 1. What does the fur coat of a bear have to do with homeostasis? 2. How is reproduction related to heredity? 3. What are some stimuli in your environment? How do you respond to these stimuli? 4. Why are most cells 70% water? 5. Could life as we know it exist on earth if air contained only oxygen? Explain 6. How might a cave, an ant, and a lake meet the needs of an organism? 7. What would happen to the supply of ATP in your cells if you did not eat enough carbohydrates? How would this affect your cells? 8. What is the difference between sexual and asexual reproduction?